/**
 * @author 兴趣使然黄小黄
 * @version 1.0
 * @date 2023/3/28 19:59
 */
public class TestClass {

    public static void main(String[] args) {
        String s = "abcABC";
        for (char c : s.toCharArray()) {
            System.out.print((char)(c^32));
        }
    }
}
